Electrical precipitator



July 10, 1934, R. HEI RI H 1,965,924

Fild Aug.- 26, 1931 Patented July 10, 1934 UNITED STATES ELECTRICAL PRECIPITATOR Richard Heinrich, Berlin-Sudende, Germany, as-

signor', by mesne assignments, to International Precipitation Company, Los Angeles, Calif., a corporation of California Application August 26, 1931, Serial No. 559,459 In Germany August 30, 1930 My invention relates to improvements in elec trical precipitators and more particularly to collecting electrodes with dead-air spaces for electrical precipitators.

It is known that lately collecting electrodes having dead-air spaces have often been employed in electrical precipitators. Such electrodes have on the side facing the discharge electrodes recesses which serve for the reception or trapping of the suspended particles precipitated by the electrical discharge field. Electrodes of that kind have been designed in the most various manners. These electrodes have, for example, been formed as hollow bodies with openings through which the dust can enter into the hollow interior of the electrode. Such electrodes have a relatively large.

tion by the gas current and thus prevented the accumulation of dust. That kind of electrode with vibrating wires although satisfactory is relatively expensive in the making. In the following, a collecting electrode is described and illustrated which has the same good collecting features, but is considerably-cheaper to make.

I According to my invention the collecting electrode is made to consist of a plurality of pieces of section iron placed the one directly against the other and forming electrodes having a large surface. Broad-flanged double T-iron is particularly suitable for that purpose. With a collecting electrode consisting of section iron put together in said manner, only the narrow edges face the discharge electrode, so that, therefore, only a small surface,

.not larger than that with a vibrating wire electrode, is available for the dust to accumulate. A special advantage of an electrode of that kind consists in that itcan be put together to any size and that parts of standard dimensions can be employed for the purpose so that the price of the electrode is very low. It is an advantage with collecting electrodes of that kind to place the section iron in a slanting position, so that the dust 5o depositing itself on the slanting surfaces formed by the flanges can slide down into the hopper without being whirled up. The flanges may ad vantageously be placed oblique to the centre piece. In this manner a particularly good removal of the dust is ensured without its being disturbed by the gas current.

Figs-1 and 2 of the accompanying drawing are views in plan and elevation of an example for carrying out my invention. Thenumerals 1 and 2 indicate two collecting electrodes formed, as

shown in the drawing, by placing one against the other a plurality of pieces of section or profile iron, the flanges of each piece of section iron being oblique to the centre part. Between the two collecting electrodes is located the discharge electrode 3. The gas to be cleaned flows in the direction of the arrows 4 between the two collecting electrodes 1 and 2. The dust precipitated by the discharge field falls ultimately into the deadair spaces formed by the flanges of each piece of section iron and slides on the slanting surface of these flanges undisturbed by the gas current down into the collecting bin not shown in the drawing.

I claim as my invention:

1. In an electrical gas-cleaning apparatus, the combination of a housing provided with a throughway for a current of gas, a discharge electrode arranged within said housing, and a collecting electrode comprising a plurality of structural sections arranged in close formation and forming a substantially closed wall extending parallel to the direction of the gas current passing through said housing, said structural sections being inclined from top to bottom in the general structural sections placed one against another,

to form a substantially closed partition wall extending in the general direction of the current flow, said structural sections forming dust trapping spaces provided with openings presented laterally from the closed partition wall and inclined forwardly in the direction of the current flow.

3. In an electrical gas-cleaning apparatus, the

combination of a housing provided with a throughway for a current of gas, a discharge electrode extending within said'housing substantially parallel to the direction of the gas current passing therethrough, and collecting electrodes arranged on opposite sides of said discharge electrode, each of said collecting electrodes comprising a plurality of structural sections of H-shaped crosssection having their outwardly-presented flanges inclined to the central fiat web portions and arranged in close formation with their flat web portions in a common plane substantially parallel to said discharge electrode, said structural sections being inclined from top to bottom towards the direction of the current flow with their outwardlypresented flanges inclined forwardly with respect to the direction of the current.

RICHARD HEINRICH. 

